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authorRonald S. Bultje <rbultje@ronald.bitfreak.net>2003-12-09 23:08:17 +0000
committerRonald S. Bultje <rbultje@ronald.bitfreak.net>2003-12-09 23:08:17 +0000
commit1c1767f82e5291dc0e49bb3283addde24184fcb4 (patch)
tree1cf28c211f6f0a2991e2679f3fa8b4216dc10cd1
parentd04fb4dc6cf97b54418d8c7b1b20cc92c3f06e4b (diff)
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Implement something to make video play faster/slower
Original commit message from CVS: Implement something to make video play faster/slower
-rw-r--r--gst/videodrop/gstvideodrop.c106
-rw-r--r--gst/videodrop/gstvideodrop.h5
2 files changed, 95 insertions, 16 deletions
diff --git a/gst/videodrop/gstvideodrop.c b/gst/videodrop/gstvideodrop.c
index eedf56be..e3df20a2 100644
--- a/gst/videodrop/gstvideodrop.c
+++ b/gst/videodrop/gstvideodrop.c
@@ -39,6 +39,7 @@ enum {
enum {
ARG_0,
+ ARG_SPEED
/* FILL ME */
};
@@ -87,6 +88,18 @@ static void gst_videodrop_class_init (GstVideodropClass *klass);
static void gst_videodrop_init (GstVideodrop *videodrop);
static void gst_videodrop_chain (GstPad *pad, GstData *_data);
+static void gst_videodrop_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gst_videodrop_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec);
+
+static GstElementStateReturn
+ gst_videodrop_change_state (GstElement *element);
+
static GstElementClass *parent_class = NULL;
/*static guint gst_videodrop_signals[LAST_SIGNAL] = { 0 }; */
@@ -131,7 +144,20 @@ gst_videodrop_base_init (gpointer g_class)
static void
gst_videodrop_class_init (GstVideodropClass *klass)
{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
parent_class = g_type_class_peek_parent (klass);
+
+ g_object_class_install_property (object_class, ARG_SPEED,
+ g_param_spec_float ("speed", "Speed",
+ "Output speed (relative to input)",
+ 0.01, 100, 1, G_PARAM_READWRITE));
+
+ object_class->set_property = gst_videodrop_set_property;
+ object_class->get_property = gst_videodrop_get_property;
+
+ element_class->change_state = gst_videodrop_change_state;
}
#define gst_caps_get_float_range(caps, name, min, max) \
@@ -206,38 +232,90 @@ gst_videodrop_init (GstVideodrop *videodrop)
videodrop->inited = FALSE;
videodrop->total = videodrop->pass = 0;
+ videodrop->speed = 1.;
}
static void
-gst_videodrop_chain (GstPad *pad, GstData *_data)
+gst_videodrop_chain (GstPad *pad, GstData *data)
{
- GstBuffer *buf = GST_BUFFER (_data);
- GstVideodrop *videodrop;
-
- GST_DEBUG ("gst_videodrop_chain");
+ GstVideodrop *videodrop = GST_VIDEODROP (gst_pad_get_parent (pad));
+ GstBuffer *buf;
- g_return_if_fail (pad != NULL);
- g_return_if_fail (GST_IS_PAD (pad));
- g_return_if_fail (buf != NULL);
-
- videodrop = GST_VIDEODROP (gst_pad_get_parent (pad));
-
- if (GST_IS_EVENT (buf)) {
- gst_pad_push (videodrop->srcpad, GST_DATA (buf));
+ if (GST_IS_EVENT (data)) {
+ gst_pad_event_default (videodrop->srcpad, GST_EVENT (data));
return;
}
+ buf = GST_BUFFER (data);
+
videodrop->total++;
- while (videodrop->to_fps / videodrop->from_fps >
+ while (videodrop->to_fps / (videodrop->from_fps * videodrop->speed) >
(gfloat) videodrop->pass / videodrop->total) {
videodrop->pass++;
gst_buffer_ref (buf);
+ GST_BUFFER_TIMESTAMP (buf) /= videodrop->speed;
gst_pad_push (videodrop->srcpad, GST_DATA (buf));
}
gst_buffer_unref (buf);
}
+static void
+gst_videodrop_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GstVideodrop *videodrop = GST_VIDEODROP (object);
+
+ switch (prop_id) {
+ case ARG_SPEED:
+ videodrop->speed = g_value_get_float (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_videodrop_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GstVideodrop *videodrop = GST_VIDEODROP (object);
+
+ switch (prop_id) {
+ case ARG_SPEED:
+ g_value_set_float (value, videodrop->speed);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static GstElementStateReturn
+gst_videodrop_change_state (GstElement *element)
+{
+ GstVideodrop *videodrop = GST_VIDEODROP (element);
+
+ switch (GST_STATE_TRANSITION (element)) {
+ case GST_STATE_PAUSED_TO_READY:
+ videodrop->inited = FALSE;
+ videodrop->total = videodrop->pass = 0;
+ break;
+ default:
+ break;
+ }
+
+ if (parent_class->change_state)
+ return parent_class->change_state (element);
+
+ return GST_STATE_SUCCESS;
+}
+
static gboolean
plugin_init (GstPlugin *plugin)
{
diff --git a/gst/videodrop/gstvideodrop.h b/gst/videodrop/gstvideodrop.h
index f5209842..429be2c4 100644
--- a/gst/videodrop/gstvideodrop.h
+++ b/gst/videodrop/gstvideodrop.h
@@ -45,8 +45,9 @@ struct _GstVideodrop {
/* video state */
gboolean inited;
- float from_fps,
- to_fps;
+ gfloat from_fps,
+ to_fps;
+ gfloat speed;
guint64 pass, total;
};